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研究了以1mol·L-1NH4SCN为介质，甲基异丁基甲酮（MIBK）萃取，4mol·L-1硝酸反萃取火焰原子吸收光谱水相测定微量钻的方法．钴量在0－5mg·L-1范围内呈良好的线性关系，检出限为0．070mg·L-1，相对标准偏差为1．17％．该方法适用于腺苷钴胺片中微量钻的测定．
A method for the determination of trace drilling by flame atomic absorption spectrometry with 1 mol·L-1 NH4SCN as medium, MIBK extraction and 4mol·L-1 nitric acid back extraction was studied. Cobalt content in the range of 0-5mg · L-1 showed a good linear relationship with a detection limit of 0.070mg · L-1 and a relative standard deviation of 1.17%. This method is suitable for the determination of trace diamonds in adenosylcobalamin tablets.